AI "art" is always plagiarism due to the way it works. Unlike normal art, where one could draw inspiration from someone else's work and incorporate / replicate their style, AI takes a look at the noise of the presented picture and checks which pixel / level of noise is most likely to be next to another. From this data it then generates another noise map if given a prompt indicating it should try to make something like the data it received.
This process cannot be done without copyright infringement.
If you want art, then learn to do art, or get an artist to do the work for you. It is incredibly fulfilling to see the fruits of ones labour after finishing an artwork.